sma03 - Compaction Purposes of Compaction Compaction is the...

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Unformatted text preview: Compaction Purposes of Compaction Compaction is the application of energy to soil to reduce the void ratio This is usually required for fill materials, and is sometimes used for natural soils Compaction reduces settlements under working loads Compaction increases the soil strength Compaction makes water flow through soil more difficult Compaction can prevent liquefaction during earthquakes Factors affecting Compaction Water content of soil The type of soil being compacted The amount of compactive energy used Laboratory Compaction tests Equipment collar (mould extension) Cylindrical soil mould Hammer for compacting soil Handle Base plate Sleeve guide Laboratory Compaction tests Equipment collar (mould extension) Cylindrical soil mould Hammer for compacting soil Handle Base plate Sleeve guide M o u l d v o l u m e H a m m e r m a s s H a m m e r d r o p S t a n d a r d 1 0 0 0 2 . 5 3 0 0 M o d i f i e d 1 0 0 0 4 . 9 4 5 0 Presentation of results The object of compaction is to reduce the void ratio, or to increase the dry unit weight. dry s w G e = + 1 Presentation of results The object of compaction is to reduce the void ratio, or to increase the dry unit weight. In a compaction test bulk unit weight and moisture content are measured. The dry unit weight may be determined as follows dry s w G e = + 1 bulk s w W V Wt of Solids Wt of Water TotalVolume W W V = = + = + Presentation of results The object of compaction is to reduce the void ratio, or to increase the dry unit weight. In a compaction test bulk unit weight and moisture content are measured. The dry unit weight may be determined as follows dry s w G e = + 1 bulk s w W V Wt of Solids Wt of Water TotalVolume W W V = = + = + bulk w s s W W W V = + 1 Presentation of results The object of compaction is to reduce the void ratio, or to increase the dry unit weight....
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This note was uploaded on 08/30/2011 for the course CIVL 2410 taught by Professor Dairey during the Three '11 term at University of Sydney.

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sma03 - Compaction Purposes of Compaction Compaction is the...

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